Passion vine hopper (PVH) is a significant production pest of kiwifruit that can cost the industry millions of dollars in a season with unfavourable PVH activity. The losses largely result from the sooty mould which grows on the sugary secretions PVH leaves on kiwifruit.

To tackle the problem, Zespri undertook a four-year research project to develop an integrated pest management (IPM) programme for use against PVH that is not reliant on agrichemicals. The research has three key objectives:

• Reduce PVH population at the source
• Minimise PVH migration into the orchard
• Manage PVH within the orchard blocks

This project, partly funded by A Lighter Touch, was led by the Bioeconomy Science Institute – Plant and Food Research group, and brought together scientists, industry representatives, spray contractors, and 20 growers who would test the strategies on their commercial orchards.

The project investigated biological and cultural controls, as well as the most effective spray product/product combination against PVH nymphs and eggs. Over the course of the project, growers were able to reduce PVH dispersal into their adjacent kiwifruit blocks using border clearing, the use of well-timed interventions, and having well-designed shelters in place. For those with PVH populations within the orchard block, the benefits of a winter spray targeting eggs laid in kiwifruit blocks or mowing in spring to kill nymphs have also been demonstrated.

The researchers have given multiple presentations and supported several PVH field days – hosted by Zespri or post-harvest, sharing findings with growers. The project has been successful with many growers already taking up the IPM programme to help manage PVH. There will be ongoing extension to increase adoption of PVH IPM in the industry.

Watch a video case study, check out project results and  grower resources.